Bottom Bracket Shells

Our selection of bottom bracket shells includes threaded, non-threaded, BB30, PF30, and 41 mm Press Fit in a variety of sizes and materials. They are machined in one operation. The threads, bores, and faces are as perfectly concentric, square, and parallel as can be manufactured on modern CNC equipment. There is no need for any pre-machining on the framebuilders' part before fabrication.

Important Information

Our threaded bottom bracket shells are 1.37" x 24 threads per inch (also known as British Standard, ISO/English or BSA) or M47 x 1 mm (also know as T47). They are right and left threaded and are compatible with all modern bottom bracket spindles.